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Unformatted text preview: o Depression : 30% due to genes o Schizophrenia : 80-86% o IQ: 50% o Temperament : 40-50% How do you test for heritability? o Twin Studies: Type 1 o MZ twins raised apart (monozygotic) o Share 100% of their DNA o Identical twins o Different Environments: Similarity due to genes o Limitations: Adoption environments similar; hard to find these twins o Twin Studies: Type 2 o MZ raised together and DZ (dizygotic) raised together o DZ: Two zygotes share the same womb, also known as Fraternal twins and share 50% of their DNA o Controls for shared environment effects o Heritability = (MZ same DZ same) x 2 How Nature and Nurture Work Together?...
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- Fall '08